Isopropyl Isostearate → Isostearyl Alcohol EX

Participants

Reaction Conditions

Reaction Steps

Into a 20 liters autoclave were charged 4770 g of isopropyl isostearate [Emery 2310, isopropyl isostearate, available from the Emery Co., Ltd. of U.S.A.) and 239 g of a copper-chromium catalyst (Nikki Co., Ltd.). Thereafter, hydrogen gas was charged into the autoclave at a pressure of 150 kg/cm2, followed by heating the reaction mixture to 275° C. After the hydrogenation under conditions of 150 m kg/cm2 and 275° C. for about 7 hours, the resulting reaction product was cooled, from which the solid catalyst was removed thereby obtaining 3500 g of a crude product. The crude product was distilled under reduced pressure to obtain 3300 g of colorless, transparent isostearyl alcohol as a distillate of 80° to 167° C./0.6 mmHg. The thus obtained isostearyl alcohol (monomethyl-branched isostearyl alcohol) had an acid value of 0.05, a saponification value of 5.5, and a hydroxyl group value of 181.4. The alcohol had absorption peaks at 3340 and 1055 cm-1 in the IR analysis and at delta 3.50 (broad triplet, --CH2 --OH) in the NMR analysis (CCl4 solvent). It was found from the gas chromatography that the alcohol was a mixture of alcohols which had about 75% of an alkyl group containing 18 carbon atoms in total with the remainder having 14 to 16 carbon atoms in total and whose branched methyl groups were positioned almost at the central portion of the alkyl main chain.

Provenance & Evidence